Gilardoni 74cc diaphragm-controlled cylinder.
This kit is one of the most powerful available for Puch; the manufacturer promises 10hk with the right accessories.
Piston, piston pin, cams, cylinder head, reed valve, intake manifold, and gaskets are included.
Also fits our Swedish V3 engines with the same bolt pattern, but expect to need both crankshaft housing machining and adjustment of the compression clearance to the correct dimensions.
Intake dimensions:
Outer Ø 23 mm
Inner Ø 18.5 mm.
Use, for example, a 19 mm carburetor (part no. 18536) + bushing (part no. 19253) and an expansion pipe.
If you wish to use a carburetor larger than 19 mm, the intake and reed valve for the AM6 can be used.